Speaker
Dominik Schomas
(Albert-Ludwigs Universität, Freiburg)
Description
A doped helium nanodroplet irradiated by intense near-infrared (NIR) laser pulses forms a highly ionized nanoplasma even at laser intensities where the helium is not directly ionized. The dopant atoms provide first seed electrons which start the electron impact ionization avalanche of the whole droplet. The dynamics of ignition and explosion of the nanoplasma depends not only on the number and the kind of dopants but also on the droplet size and laser intensity. We present single shot velocity map imaging (VMI) measurements of electrons produced by irradiation of pure and xenon doped helium nanodroplets with intense NIR femtosecond laser pulses at various laser intensities for different helium and dopant cluster sizes. The salient structures of the electron spectra are discussed and compared to molecular dynamics simulations. Additionally, ion time of flight (TOF) spectra are recorded in parallel to the electron VMI.
Primary authors
Andreas Heidenreich
(University of the Basque Country (UPV/EHU) and Donostia International Physics Center (DIPC), Donostia; IKERBASQUE, Bilbao)
Cristian Medina
(Albert Ludwigs University of Freiburg)
Dominik Schomas
(Albert-Ludwigs Universität, Freiburg)
Marcel Mudrich
(Aarhus University)
Nicolas Rendler
(Albert Ludwigs University of Freiburg)
Robert Moshammer
(Max Planck Institute for Nuclear Physics, Heidelberg)
Thomas Pfeifer
(Max Planck Institute for Nuclear Physics, Heidelberg)
